506289994549 has 2 divisors, whose sum is σ = 506289994550. Its totient is φ = 506289994548.

The previous prime is 506289994537. The next prime is 506289994577. The reversal of 506289994549 is 945499982605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284243591025 + 222046403524 = 533145^2 + 471218^2 .

It is a cyclic number.

It is not a de Polignac number, because 506289994549 - 2⁷ = 506289994421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506289994349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253144997274 + 253144997275.

It is an arithmetic number, because the mean of its divisors is an integer number (253144997275).

Almost surely, 2^506289994549 is an apocalyptic number.

It is an amenable number.

506289994549 is a deficient number, since it is larger than the sum of its proper divisors (1).

506289994549 is an equidigital number, since it uses as much as digits as its factorization.

506289994549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 251942400, while the sum is 70.

The spelling of 506289994549 in words is "five hundred six billion, two hundred eighty-nine million, nine hundred ninety-four thousand, five hundred forty-nine".